Merge pull request #141 from Mirantis/missing_linux_codename

add missing parametr linux_codename
diff --git a/reclass/storage/system/openstack_gateway_cluster.yml b/reclass/storage/system/openstack_gateway_cluster.yml
index 96ae486..f9d4485 100644
--- a/reclass/storage/system/openstack_gateway_cluster.yml
+++ b/reclass/storage/system/openstack_gateway_cluster.yml
@@ -27,7 +27,7 @@
           - cluster.${_param:cluster_name}.openstack.gateway
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: ${_param:linux_system_codename}
             single_address: ${_param:openstack_gateway_node02_address}
             tenant_address: ${_param:openstack_gateway_node02_tenant_address}
         openstack_gateway_node03: